Yamaha 2012 Grizzly 300 Service Manual page 274

EBS01045
TROUBLESHOOTING
The ignition system fails to operate (no
spark or intermittent spark).
Check:
1. Spark plug
2. Ignition spark gap
3. Spark plug cap resistance
4. Ignition coil resistance
5. Main switch
6. Engine stop switches
7. Pickup coil resistance
8. Wiring connections (of the entire ignition
system)
TIP
• Before troubleshooting, remove the following
part(s):
1. seat
2. front fender
3. fuel tank
• Troubleshoot with the following special
tool(s).
Dynamic spark tester
P/N. YM-34487
Ignition checker
P/N. 90890-06754
Pocket tester
P/N. YU-03112-C, 90890-03112
IGNITION SYSTEM
EBS01032
1. Spark plug
• Check the condition of the spark plug.
• Check the spark plug type.
• Measure the spark plug gap.
Refer to "CHECKING THE SPARK PLUG"
in chapter 3.
Standard spark plug
CR8E (NGK)
Spark plug gap
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
• Is the spark plug in good condition, is it of
the correct type, and is its gap within spec-
ification?
YES
9-7
ELEC
– +
NO
Re-gap or replace
the spark plug.